Hey Natasha, thanks for reaching out with a heads up on this!
This does appear to be a theme conflict, as you correctly noted.
The theme author should also likely be notified of this, but here’s something you should be able to add to the theme (preferably child theme) style.css file or using Simple Custom CSS, to make that text go away:
#top .tribe-events-page-template #wrap_all .main_color h3 {
display: none;
}
It appears that the theme intends that to be screen reader text as an accessibility feature. That’s awesome, but is still worth letting them know because they might have a cleaner way of removing the text without it affecting the benefits of accessibility.
Thanks!
Geoff